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https://issues.apache.org/jira/browse/YARN-5630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15477843#comment-15477843
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Arun Suresh commented on YARN-5630:
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bq. Is there a compelling reason to bother updating the schema version given
the presence of a container version key (or really any unrecognized container
key) will prevent the old software from starting?
Hmmm... given that the IOExecption in the loadContainer will bomb anyway..
guess it should be fine then
> NM fails to start after downgrade from 2.8 to 2.7
> -------------------------------------------------
>
> Key: YARN-5630
> URL: https://issues.apache.org/jira/browse/YARN-5630
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Blocker
> Attachments: YARN-5630.001.patch, YARN-5630.002.patch
>
>
> A downgrade from 2.8 to 2.7 causes nodemanagers to fail to start due to an
> unrecognized "version" container key on startup. This breaks downgrades from
> 2.8 to 2.7.
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